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Author Topic:   SPORTSMAN II HEADS
IMCAMOD17
Dirt Roller

Total posts: 17
posted August 11, 2002 02:00 PM
Do you need to change push rods or any other parts when switching to world products SPORTSMAN II heads? Our rocker arms seem to have too much free play in them after we set the valve lash. You can wiggle the rocker arms side to side quite a bit. It looks like they will move a lot when the engine is running. Would putting guide plates on help this? Thanks for any help.

GnarlyCar
Dirt Newbie

posted August 11, 2002 02:15 PM
You need either guideplates or larger diameter pushrods. If you look at the hole that the pushrod comes through and compare it to the same hole on a stock head, you'll notice the one on the sportsman head's quite a bit larger, and yes..your rockers can fall off. I had a replacement engine built for a tow rig a few years back by a guy who normally builds race engines, and he used a set of stock heads that had had the pushrod holes opened up. Rockers came off the first day I drove it so he replaced the pushrods with larger diameter ones and I never had another problem with it. Well..till it blew up the next year, but that wasn't a pushrod problem..roflmao

Good luck
Matt

IMCAMOD17
Dirt Roller

Total posts: 17
posted August 11, 2002 04:30 PM
thanks i will put the guide plates on. is there any other things that need changed or will everything else just swap over and be fine?

tdevans93
Dirt Roller

Total posts: 14
posted August 12, 2002 09:19 AM
Should Bolt Right Up.

GnarlyCar
Dirt Newbie

posted August 12, 2002 02:45 PM
Make sure you get the guideplates positioned exactly where they need to be. The holes that are in them are a bit larger than the studs that go through them most of the time, so there's room to get them off center a little bit one way or the other. If you get them off center too far, you'll rub the side of the pushrod too much and it'll gall and break a lot sooner than it otherwise should.
Also, be sure to use a little Loctite again when you reinstall your studs so they don't back out.

Good Luck,
Matt

[This message has been edited by GnarlyCar (edited August 12, 2002).]

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